Improvement in cutter-heads



E, BQHAYES. Y Improveinent in'Cutter Heads.

N0. 11853675, Patented Aug. 22, 1871l UNITED STATES ELI B. HAYES, OFVERGENNES, VERMONT.

IMPROVEMENT IN CUTTER-HEADS.

Specification forming part of Letters Patent No. 118,365, dated August22, 1871.

To all whom t may concern:

Be it known that I, ELI B. HAYES, of Vergennes, in the county of Addisonand in the State of Vermont, have invented certain new and usefulImprovements in Cutter-Heads and do hereby declare that the following isa full, clear, and exact description thereof, reference being had to theaccompanying drawing and to the letters of reference marked thereonmaking a part of this specification.

rI he nature of my invention consists in the construction of knives madefor cutting ogee or bevel or any desired form for work on doors, sash,blinds, and moldings; and also in the construction of the head andmethod of securing the knives to it, all of which will be hereinaftermore fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a plan view, and Fig. 2 a side view of my cutter-head andknives.

A A represent the knives,which are constructed in the following manner:The desired form is cut on the face of the knife along its entire lengthin such a manner that, being ground at any desired bevel on vthe otherside, the cutting-edge Vwill retain the same form until the knife isused up too shortrto work. The object of this is to preserve auniformity in the Work done by the knives, whether cutting ogees,bevels, or groov- Aing, or in running moldings, Sac., by avoiding theliability to change the shape of the knife or cutter at each time ofgrinding or sharpening. B represents the head, which is provided withgrooves b b to fit the knives, and beveled grooves a a are formed on theinner edge of the knives. A plate, C, grooved to match, is fitted overthem, and the Whole rmly secured by bolts D D, the face of the pla-te Cbeing thus made flush with the edge of the cutters.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The knives A A, secured to the head B by means of the grooved plate Cfitting in the bev eled grooves on the knives,and fastened to the headby bolts D D, substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this26th day of June, 1871.

vitnesses: E. B. HAYES.

GHAs. E. PARKER, E. L. TAYLOR.

